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68193020 = 2257487093
BaseRepresentation
bin1000001000010…
…00101011111100
311202022120020102
410010020223330
5114424134040
610433340232
71455426320
oct404105374
9152276212
1068193020
1135547475
121aa07678
13111881cc
1490b1980
155ec0515
hex4108afc

68193020 has 24 divisors (see below), whose sum is σ = 163663584. Its totient is φ = 23380416.

The previous prime is 68193019. The next prime is 68193029. The reversal of 68193020 is 2039186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68193029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243407 + ... + 243686.

It is an arithmetic number, because the mean of its divisors is an integer number (6819316).

Almost surely, 268193020 is an apocalyptic number.

It is an amenable number.

68193020 is an abundant number, since it is smaller than the sum of its proper divisors (95470564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68193020 is a wasteful number, since it uses less digits than its factorization.

68193020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487109 (or 487107 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 68193020 is about 8257.9065143655. The cubic root of 68193020 is about 408.5513419586.

The spelling of 68193020 in words is "sixty-eight million, one hundred ninety-three thousand, twenty".

Divisors: 1 2 4 5 7 10 14 20 28 35 70 140 487093 974186 1948372 2435465 3409651 4870930 6819302 9741860 13638604 17048255 34096510 68193020